STUDIES IN NEOTROPICAL MALLOPHAGA—CARRIKER 129 
CUCLOTOCEPHALUS EXTRANEUS SIMILIS, new subspecies 
FIGURE 9, @, C 
Types—Male and female, adults, from Nothoprocta p. pentlandi, 
collected by the author at Choros, Dept. Cochabamba, Bolivia, on 
sanuary 10, 1987; in collection of the author. 
There is very little difference in size between extraneus and similis, 
the former being slightly larger in all dimensions, with the abdomen 
much wider (0.80 against 0.64 mm.) ; the markings of the paratergal 
plates are decidedly different (see fig.). - In extraneus they are wider 
and have the greater part deeply colored, with this more heavily 
chitinized portion concave on the inner side, with the top and bottom 
portions reaching te the inner side of the sclerite. In stmilis the 
paratergal plates are narrower, and have the deeply colored portion 
reduced to a narrow band along the outer margin of the sclerite. A 
character not mentioned in the original description of extraneus, and 
present also in similis, is the tessellated dorsal surface of the ptero- 
thorax and abdomen more noticeable on the paratergal plates. The 
chaetotaxy of the abdomen is essentially the same in the two races, 
except that the prominent dorsal hairs are shorter and slenderer. 
MEASUREMENTS OF CUCLOTOCEPHALUS EXTRANEUS 
similis 
extraneus at Sao, PAL SE ve es OTS TO 
(type, female) 
Structure Male Female 
Length | Width | Length | Width | Length | Width 
TBXOCO A ay kG MA a DD Fie etic LAYS} | ae ee 1,90 
TSK Y0 ia is aE PA els 0 a I i 0. 52 0. 53 0. 44 0. 43 0. 50 0. 49 
BrOCH OAK M eee tre EB rR eR ep RN ANTS 0. 19 0. 325 0. 174 0. 26 0.17 0. 29 
IB terotChoraxee eee wien, WON ec 0. 34 0. 42 0. 29 0. 347 0. 326 0. 395 
PAC OIMMETIN py muse n Neo OLN Me NENA RL UA 1, 22 0. 80 0. 88 0. 58 1.19 0. 64 
PAN CONN AC Metnua elke mule a afl aaa EAN Lo! Lib O8227/)| 2am eee ee 0. 24 0. 045 0. 217 0. 04 
FT BYGSTEM FO) KE Hey Sa ae gs Ne 0. 195 COSCO Gare) |RSS) KEL re 
PAT ATTLOT Sie ne alae Uk MeO 0. 195 CO OLEAN Sc ag Pa S| a 
Endomeral plate__.....-.-.--------------- 0. 105 ON OG yee erie zp Ath se ell teh a eager 
The male genitalia are quite simple, consisting of a short basal plate, 
scarcely, if any, longer than the paramers, not so wide, and poorly 
chitinized ; the paramers are thicker at their bases, tapering slightly 
to their tips, which are bent inward. The dorsal endomeral plate 
overlaps the inner edge of the paramers for most of its length, is 
slightly more than half the length of the paramers, and has the pos- 
terior end bluntly pointed; the ventral endomeres are reduced to a 
pair of short, narrow bars on each side of the dorsal endomere; penis 
absent. 
575507—_44—_4 
